@brief Positive infinity constant */

initializer of private fields */

Scratch buffer initialization dispatcher ////////////////////////////////

启动时只检查一次：若无文件 / 被篡改 / 已过期 => 让用户输入密码重置

Initialize some variables */

FIXIT dev.isAMD() doesn't work for OpenCL CPU devices from AMD OpenCL platform. This method should use platform name instead of vendor name. After fix